Yamamoto Optical YAMAMOTO Blue Light Blocking Sunglasses Attaches To Your Existing Made of Made In UV YE-480BC Flip-up Clip-on - Glasses. Cellulose.

These clip-on lenses easily attach to your glasses, blocking blue light. They can be worn when needed and flipped up when not required, making them ideal for computer work. *Many workplaces are filled with bright light from computers, LCD monitors on production equipment, LED lighting, and more. Much of this light emits strong blue light to enhance brightness. Prolonged exposure to blue light can lead to eye strain. Blue light cut rate of 33% (*), and harmful ultraviolet rays (below 380nm) are cut by 99.9%. *Values based on EN standard EN ISO12312-1:2013